Final answer:
The Maastricht Treaty led to the creation of an economic and monetary union in Europe, resulting in the establishment of the European Union and the introduction of the euro. The correct answer is 2) the creation of an economic and monetary union in Europe.
Step-by-step explanation:
The Maastricht Treaty called for the creation of an economic and monetary union in Europe.
This effort by European nations post-World War II was designed to avoid future conflicts by tying their economies together, beginning with a free trade association, evolving to a common market, and finally becoming a full economic union with the establishment of the European Union (EU).
The EU introduced the euro as a common currency and worked to eliminate barriers to the mobility of goods, labor, and capital across member countries.
Therefore, the correct answer is 2) the creation of an economic and monetary union in Europe.